What is the difference between 91w and 94w on tires?

[DelEmma]

Tire specifications 91w and 94w refer to the tire's load index and speed rating. The number 91 indicates the load index, meaning the tire can bear a maximum weight of 615 kg, while 94 represents a load index of 670 kg. The letter 'w' denotes the speed rating, indicating the tire's maximum speed limit of 270 km/h. Here's an example to illustrate the meaning of numbers and letters in a tire model: 225/60R1799H. 1. 225: Represents the section width, which is essentially the width of the tire tread. 2. 60: Indicates the aspect ratio, referring to the height of the tire's sidewall. 3. R: Stands for the tire type code, with 'R' representing radial tires. 4. 17: Denotes the rim diameter, meaning the tire is suitable for 17-inch rims. 5. 99: Represents the load index, indicating the maximum weight the tire can bear. A load index of 99 corresponds to a maximum weight of 775 kg. 6. H: Indicates the speed rating, showing the tire's maximum speed capability. An 'H' rating means the tire can withstand speeds up to 210 km/h.